noun
cow
KOW/kaʊ/
An adult female bovine or other large mammal.
The dairy cow stands with her udder clearly visible.
Etymology
Old English cu already named the animal. The modern meaning preserves that basic sense: a female bovine, with dairy cattle a particularly familiar example.
In context
to already be 900 pounds by the time a cow is two years of age that animal is almost a fully grown adult